[yyuugg]

Are those body builders controlling for other variables? Changes in diet, exercise, performances, routines, etc?

I'd believe any number of things could correlate with body builders as they spend a lot of time changing their bodies.

[dyauspitr]

I believe anecdotally that a lot of bodybuilders get on a T cycle after atleast a year or so of spending a lot of time in the gym natty. So noticing a relative difference might normalize for the other changes.